Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnDetails
7812121
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 267
Factored
FactorDigitsBitsDate
171866663927.4old
65465573991032.62008-09-08 03:39:53
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
PRP without proof (not generated)
2018-05-14storm55104B7BD4F21315F938290963453
Verified
PRP without proof (not generated)
2019-10-14GAN4B7BD4F21315F9382337148453
History
DateUserTypeResult
2024-01-31Stef42NF-PM1B1=843000, B2=1382772300
2019-10-14GANC-PRPM7812121/171866663/6546557399 : 4B7BD4F21315F938
2018-05-14storm5510C-PRPM7812121/171866663/6546557399 : 4B7BD4F21315F938
2008-09-08Will EdgingtonFFactor: 6546557399